The burden of proof isn't on her. Any scientifically minded individual has more than enough right to say that there's no such thing as a deer with wings, because there's no evidence, probability, or ecological
reason for its existence! Sure the giant eel is a popular theory
now but before that it was a dinosaur, and before that a sea monster. People keep adapting the nature of this "monster" as science is constantly evolving and making its identity as myth laughably obvious. Why do they do it? Because they want it to be true. Before you accuse me of wanting it to
not be true, let me just say that I'd love nothing more. As a lover of both animals and science, few things are as exciting as discovering a creature that completely redefines what we know about wildlife biology. But its all b.s.!
I can't give you ultra definitive irrefutable chocolatey covered proof that there is no loch ness monster any more than you can prove definitively that there isn't a 60ft ice cream sandwich anywhere in china. You'd have to go through every since inch of china to confirm that statement and I'd have to scour the ocean for a mutant eel.
But when in doubt, overwhelm with evidence:
1. If it was only one monster it'd have to be hundreds of years old.
2. There isn't enough food for
one monster. Loch Ness is almost entirely plankton. If the dinosaur/eel was the length of a limo it would eat the entire lake's supply of char, salmon, and trout in about ten years.
3. A line of sonars was dragged over the entire lake and found no monster.
4. No remains have ever been found.
5. No monsters have been found in any other similar lake on the entire planet.
If you think any of the above could be skirted with the belief that the creature(s) is migratory and travels to the ocean through some magically undetectable gate, keep in mind that nessie sightings occur all year round.
6. And about the sightings, there's a thousand different things that could explain the sightings. Waves could easily be schools of fish, the temporarily surfacing head could be driftwood or an upturned boat, a tooth in a dead animal's body could easily be a
deer antler.
Its seems pretty consistent that the people who have these nessie sightings were either looking for the monster in the first place, or have something to gain from the hype. The stories of seeing a "great long neck coming out of the water" are all made by tour guides and innkeepers. And all scientific evidence is discovered by some asshole selling a book.